I'll have to make up my mind about getting the Beta of Edge and playing around with it.
There is a great deal of noise being made about "HTML 5" and the various things that are tied with it, such as CSS3, SVG & PNG images, etc. Unfortunately the effort seems spotty at best. None of the leading web browsers are fully compliant with HTML 5 standards. The majority of computer users are still using older versions of Internet Explorer that won't even support SVG and PNG without a plug-in much less HTML 5 and CSS3 related tags.
And then there's the issue of Flash being a whole lot more than a mere web graphics animation tool. A team of programmers can't make a HTML 5 version of "Farmville" or other Flash-based games.
Even more funny, the World Wide Web Consortium (W3C) is operating at a pace that would make snails seem faster than Jesse Owens. I read it somewhere (Webmonkey I think) the W3C won't fully ratify HTML 5 standards until 2021.
Many of the new features with HTML 5, CSS3 and other related technologies are great and would make putting web pages together easier and open more creative options. However, you really can only use those things if you're either willing to make the web site incompatible with many versions of web browsers in use or if you're willing to make multiple versions of your web site.
While the HTML 5 situation continues to be a stinking mess I don't see Flash going away anytime soon. Most web pages will continue to be composed using old, more compatible standards as well.